org.lsmp.djep.djep.diffRules

Class DivideDiffRule

java.lang.Object

org.lsmp.djep.djep.diffRules.DivideDiffRule

All Implemented Interfaces:

DiffRulesI

public class DivideDiffRule
extends Object
implements DiffRulesI

Differentiates a division with respect to var. diff(y/z,x) -> (diff(y,x)*z-y*diff(z,x))/(z*z)

Constructor Summary

Constructors

Constructor and Description
DivideDiffRule(String inName)

Method Summary

Modifier and Type	Method and Description
Node	differentiate(ASTFunNode node, String var, Node[] children, Node[] dchildren, DJep djep) Returns the top node of of the derivative of this function wrt to variable var.
String	getName() Returns the name of the function.
String	toString() Returns a string representation of the rule.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DivideDiffRule

public DivideDiffRule(String inName)

Method Detail

toString

public String toString()

Description copied from interface: DiffRulesI

Returns a string representation of the rule.

Specified by:

toString in interface DiffRulesI

Overrides:

toString in class Object

getName

public String getName()

Description copied from interface: DiffRulesI

Returns the name of the function. Used as index in hashtable and as way of linking with standard JEP functions. You probably want to specify the in the constructors.

Specified by:

getName in interface DiffRulesI

differentiate

public Node differentiate(ASTFunNode node,
                          String var,
                          Node[] children,
                          Node[] dchildren,
                          DJep djep)
                   throws ParseException

Description copied from interface: DiffRulesI

Returns the top node of of the derivative of this function wrt to variable var.

Specified by:

differentiate in interface DiffRulesI

var - The name of variable to differentiate wrt to.

children - the arguments of the function

dchildren - the derivatives of each argument of the function.

Returns:

top node of and expression tree for the derivative.

Throws:

ParseException - if there is some problem in compiling the derivative.